Electric heater



July 31, 1934. R. F. SCHNEIDER ELECTRIC HEATER Filed oct. 1e, 195sPatented July 31, 1934 UNITD ST ATENT orties 3 Claims.

This invention relates to electric heaters, and particularly to electricheaters of the mono-unit type.

The principal object of the present invention 5 is to provide anelectric mono-unit heater constructed of concrete or the like, ascontradistinguished from electric mono-unit heaters made of metal or thelike.

Other objects of the invention will be readily lO apparent to thoseskilled in the art upon refern ence to the following detaileddescription of an embodiment of the invention, shown in the appendeddrawing whose Fig. l is an elevational section view of the ein bodimentas if on line l-l of Fig. 2; and whose Fig. 2 is a right end view of theembodiment.

Referringr to the drawing, it will be seen that the embodiment theredisclosed comprises a concrete radiator and heater body l0 generally inthe form of a prism, the body having a hollow interior 11 lined with asheet metal box 12, preferably of galvanized iron. The body is formedwith grooves 14 of inverted U shape which provide radiating ribs 15 onthe two vertical sides and on the horizontal top of the body, the basesof the grooves being spaced far enough away from the lining l2 so as toleave a shell of concrete all around the lining.

fassed through aligned apertures in an end wall of the body 1G and in anend wall of the lining l2 and embedded in the wall of 'the body 1U is asupporting pipe 16 on the exposed threaded end of which is an internallythreaded cap 1T upon which is mounted a multi-station switch 18 providedwith a switch knob or button 19.

` The switch is mounted cn the exposed end of a small bore tube whichpasses into the box 12 through a hole in the cap 1*?, and which is surnrounded by heating coils 2l. 1t is preferred to 4o have the coils 2l soWound and interconnected that the multi-station switch 18 will applyloads of 100D watts, 500 watts, 250 watts, or 0 watts, depending uponthe position given to the knob 19 by the operator, in accordance withwell known practice in electrical heater construction.

The tube 16 is sealed at its exposed end by the cap 17 and accordinglythe hollow interior 1l remains sealed from the outside of the radiator,despite the presence of the electrical heater.

It will also be observed that the cap plate 17 and the electricalheating element carried thereby, including parts 18-21, are removable asa unit from the threaded exposed end of the embedded tube 16 andaccordingly removal and replacement of the heater for any purposewhatever can readily and easily be elfected.

Passing through the body 10, from end to end thereof, and through thelining 12, and the sealed hollow space 1l, are hollow tubes 26 whoseopen 6 ends are provided with control valves 27 of the rotatable shuttertypeL These tubes and their shutters are provided to permit acirculation of air through the tubes 26 in sealed relation, to thesealed space 11, so that, when desired, a room may be heated quickly byopening the shutters 27 and permitting the air passing through the tubes26 to be heated by the heated air in the sealed space 11.

Passing through the body 10 from end to end thereof, but above thelining 12, are tubes 28 having on their open ends shutter control Valves29, and these tubes also permit the circulation of air through theradiator, whenever desired, to enhance the heating action of theradiator, the circulating air in these tubes being heated by the heatedconcrete of the body.

inasmuch as the radiator is made of concrete, it is desirable toreinforce the same and accordingly reinforcing means are provided. Amongsuch means are the tie rods 31, passing through the body from end toend, above the lining 12 and the tubes 28, and tie rods 32 passingthrough the body from end to end below the lining 12, the tie rodshaving on their ends, heads and nuts to maintain them in place, theheads and nuts being embedded in the end walls of the body so as to lieflush with the surface thereof.

There are also provided vertical reinforcing rods 34 having their lowerends embedded in the legs 35 at the corners of the body, the rodspassing upwardly near the opposite ends of the lining l2.

There is also provided for the radiator a transverse rib 36 whosecontour is similar to that of the legs 35 and this transverse rib, aidsin supporting the unsupported span of the body, from one pair of legs 35to the other. Passing upwardly from the rib 36 and into the body of theradiator are a plurality of vertical tie rods or bolts 38 and these havetheir lower ends embedded in the rib 36 and their upper ends terminatingshort of the lining 12.

The various reinforcing rods or bolts 34 and 38 have on their ends headsand nuts, in accordance with proper practice.

The foregoing described embodiment has proven eflicient and satisfactoryin all essentials. The radiator described can be built at far less costthen heaters of equivalent performance and crete or a like material, theradiator, when once* heated, will retain its heat for aconsiderablelength of time, after the current has been turned 01T.

Other advantages and Yfeatures will readily be apparent to those Wellacquainted'with electrical heating problems and the manufacture ofelec-- trical heaters, and will not here be enumerated for purposes ofbrevity.

Now having describeda preferred embodiment,

which embodiment is disclosed by way of conrpliance with the statutesmade andA provided in such cases, and which disclosure is notfintendedas limitingl the invention to the specic details 'of'construction here'disclosed, reference wil-l be had to the appended claims fordetermination of the scope ofthe invention.

I claim:

l. An electrical heater of the class described comprising a hollowyconcrete radiator whose hollow interior is sealed 'from the outside ofthe radiator, an electrical heater` passing through an end vwall of saidradiator and into the sealed hollow space thereof and having aneXteriorly projecting portion provided with a control for the heatingvunit of the heater, a sheet metal lining for the sealed hollow space, atube passing through opposite endV walls of said radiator, lining, andspace and having open ends whereby air for the sealed hollow space, atube passing lthrough opposite end walls of said radiator, 1ining, andspace and having open ends whereby air may circulate therethrough, thetube being sealed from the space, and valves on the ends of the tube,and a second tube passing through opposite endrwalls of said radiator,remote from said lining and space and also having open ends the sideandtop of the radiator being grooved to provide radiating pinstherebetween.

3. An electrical heater of the class described comprising a hollowconcrete radiator whose hol-low interior isfsealed from the` outside ofthe 100 radiator, an electrical heater passing through an end wall ofsaid radiator and into the sealed hollow space thereof and having anexteriorly projecting portion provided with a control for the heatingunit of the heater, a sheet metal 195 lining for the sealedhollow space,a tube passing through opposite end walls of said radiator, lining, andspace and having open ends whereby air may circulate therethrough, thetube beinglsealed from thefspace, and valves on ythe ends of .the 111gtube, and a second tube passing through opposite end walls of saidradiator, remote from said lining and space and also having valvecontrolled open ends the sides and top of the radiator being grooved toprovide radiating pins therebetween. 335

' RALPH F. SCHNEIDER.

